Fast, Reliable Chimney Liner & Rebuild Across Malverne
Chimney liner replacement and rebuild work in Malverne typically runs $2,800-$7,500 depending on whether you need a stainless steel reline, a partial rebuild, or a full chimney reconstruction. Most jobs are completed in a single visit, and our technicians carry the materials to do it. If you’re in Malverne and suspect your liner is cracked, spalled, or failing a gas-conversion inspection, call (855) 950-3861 - a live person answers, day or night.
We’ve worked on chimneys along Hempstead Avenue, around Norwood Avenue, and throughout Malverne’s 11565 zip code for decades. These 1920s-1950s colonials, Capes, and Tudors have seen a lot of winters. The original terracotta flue liners were built for coal and oil heat, not for the modern gas systems PSEG Long Island is pushing into Nassau County neighborhoods. That mismatch - between old flue sizing and new appliance requirements - is the single biggest reason Malverne homeowners call us for liner work.
Why Hearthstone Chimney Co. of New York City Is Malverne’s Preferred Chimney Liner & Rebuild Company
We’ve been serving communities like Malverne for over 42 years. Our technicians know the village’s housing stock the way a carpenter knows grain - the shared flue configurations in pre-war Capes, the oversized terracotta liners meant for oil combustion, the crown deterioration that comes from repeated nor’easter exposure three miles inland from the South Shore.
Our Chimney Liner & Rebuild team completes most jobs in a single visit. We show up in uniform, background-checked, with no-hassle upfront pricing - the number on the estimate is the number on the invoice. Every inspection ends with photos you can see and a plain-English verdict. And our 90-Day Done Right Promise is in writing: if it’s not right, we come back. No arguing, no paperwork chase.
A live person answers our phones 24 hours a day, 7 days a week. Not a voicemail. Not a callback queue. When a Malverne homeowner calls at 7 p.m. because their inspection failed and the gas company won’t turn on service until the chimney is relined, someone picks up.
Our Chimney Liner & Rebuild Services in Malverne
Stainless Steel Liner Installation
Stainless steel is the standard for gas conversions in Malverne. A typical 6-inch DuraFlex stainless liner install for a gas boiler runs $2,800-$4,200 in this market. The liner is sized precisely for the appliance - too large and condensation pools; too small and draft fails. We measure, we document, we pull the Nassau County permit. For that 1937 Tudor on Harvard Avenue, we installed a 6-inch DuraFlex for the new gas boiler and left the original flue for the fireplace - solving a shared-flue violation that would have blocked certificate of occupancy.
Flexible Liner Systems
Some Malverne chimneys have offsets or bends that rigid pipe can’t navigate. Flexible liners, properly insulated, handle those turns without breaking draft. We see this often in the village’s older bungalows with chimney runs that shift as the house settled over ninety years. Flexible systems add roughly $400-$800 to the base liner cost, but they save you from a partial rebuild when the only alternative is straightening the flue.
Liner Replacement & Terracotta Removal
Original terracotta liners in Malverne homes spall and crack after decades of Long Island’s hard groundwater seepage. Once the tiles are compromised, they’re unsalvageable for gas conversion. Liner replacement means removing the damaged terracotta, inspecting the surrounding masonry, and installing a new system rated for your appliance. In Malverne, this runs $3,500-$5,500 depending on flue height and accessibility. We use Gelco and Olympia Chimney components - professional grade, no builder substitutes.
Partial Chimney Rebuild
When the crown is cracked, the top courses are spalling, and water has been entering for years, a liner alone won’t fix it. Partial rebuilds address the upper chimney structure - typically from the roofline up - while preserving sound masonry below. In Malverne’s climate, with freeze-thaw cycles oscillating around 32°F many times each winter, this is common on chimneys that lost their cap decades ago. Partial rebuilds here run $4,500-$6,800.
Full Chimney Rebuild
The most extensive cases - structural settling, widespread mortar failure, or chimneys that have been improperly modified over decades - require full reconstruction. We dismantle to sound masonry and rebuild with matching brick, proper crowns, and new flashing. Full rebuilds in Malverne’s market range from $8,500-$14,000. We pull permits, coordinate inspections, and stand behind the work with our 90-Day Done Right Promise.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Malverne
We work exclusively with professional-grade materials - DuraFlex, Gelco, and Olympia Chimney for liners; Famco and Copperfield for caps, dampers, and accessories. These aren’t builder-grade substitutes. We stock common sizes and configurations locally, so Malverne customers aren’t waiting two weeks for a specialty part. When your gas conversion inspection is holding up heat for the winter, that turnaround matters.
Common Chimney Liner & Rebuild Problems We See in Malverne Homes
- Original terracotta liners spall and crack after decades of groundwater exposure. Long Island’s hard, mineral-rich water seeps through aging mortar joints and brick crowns, destroying liner sections from the outside in. By the time a homeowner notices draft problems or staining, the damage is extensive.
- Shared flue setups violate current NYS code and Nassau County requirements. Many Malverne homes ran both fireplace and oil burner through a single terracotta flue - standard practice in 1947, illegal today. When PSEG brings gas service and the inspection happens, that violation surfaces immediately.
- Freeze-thaw cycles pump water into micro-cracks, widening them season after season. Malverne’s position in the nor’easter track means wind-driven rain and salt-laden air accelerate deterioration. Temperatures oscillate around freezing repeatedly each winter, turning small crown cracks into structural problems.
- Oil-to-gas conversions expose dangerously oversized flues. The original terracotta liner, sized for high-heat oil combustion, becomes a condensation trap with lower-temperature gas exhaust. Moisture accumulates, mortar fails, and the chimney deteriorates faster than it did under oil.
Pricing for Chimney Liner & Rebuild in Malverne, NY
| Service | Typical Range in Malverne |
|---|---|
| Stainless steel liner (straight flue, gas boiler) | $2,800 - $4,200 |
| Flexible liner with insulation | $3,200 - $5,000 |
| Liner replacement with terracotta removal | $3,500 - $5,500 |
| Partial rebuild (roofline up) | $4,500 - $6,800 |
| Full chimney rebuild | $8,500 - $14,000 |
| Level-2 camera inspection with documentation | $250 - $375 |
What moves the number? Flue height, accessibility, whether we need to remove terracotta, and whether the crown and top courses need rebuilding alongside the liner. We give you the full price before we start - no surprises on the bill. Every estimate includes permit costs for Nassau County and the village of Malverne where required.
We offer $50 off any repair over $250, free second opinions on any written estimate, and a permanent 5% senior and veteran discount. Call (855) 950-3861 for a free estimate.
We Also Serve Cities Near Malverne
Our Chimney Liner & Rebuild in Malverne crew covers the surrounding Nassau County area, including Lynbrook, Lakeview, West Hempstead, and North Valley Stream. Same live-answer phones, same upfront pricing, same 90-Day Done Right Promise.
Serving Malverne, NY - Our Local Coverage Area
We’re based in the Malverne area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Chimney Liner & Rebuild in Malverne
The original terracotta flue in your Malverne home was sized for high-temperature oil combustion. Modern gas boilers produce lower-temperature, moisture-heavy exhaust that condenses in an oversized flue, destroying mortar and creating dangerous conditions. We install a properly sized stainless steel liner - typically 6-inch DuraFlex - that matches the new appliance and satisfies PSEG and Nassau County inspection requirements. Call (855) 950-3861 for an exact quote; estimates are free.
Yes. A shared flue for fireplace and heating appliance violates current New York State and Nassau County code. When you convert to gas, the inspector will flag it, and the gas company will not authorize service until it’s separated. We reline one flue for the heating appliance and leave or restore the other for the fireplace - exactly what we did for that 1937 Tudor on Harvard Avenue. Call (855) 950-3861 to schedule an inspection before your conversion.
Nassau County’s repeated freeze-thaw cycles - temperatures crossing 32°F many times each winter - force water into micro-cracks in brick, mortar, and terracotta liner tiles. Each cycle widens the damage. Combined with wind-driven rain and salt-laden air from Malverne’s proximity to the South Shore, this causes progressive crown and liner failure that accelerates after the first visible crack. Annual inspection catches it before rebuild becomes necessary.
We install DuraFlex, Gelco, and Olympia Chimney stainless steel liners - professional-grade systems, not builder-grade substitutes. These carry manufacturer warranties and are listed for use with gas, oil, and solid-fuel appliances. We stock common diameters and lengths locally for faster turnaround on Malverne jobs. Call (855) 950-3861 to confirm sizing for your specific chimney.
Yes. Liner replacement and any flue separation work requires a Nassau County Building Department permit, plus village of Malverne compliance where applicable. We pull permits as part of our standard process - no extra charge, no paperwork for you to chase. The permit ensures the work meets current code and protects your certificate of occupancy for gas conversion. Call (855) 950-3861 and we’ll handle the details.
Written by Frank Calucci, Owner at Hearthstone Chimney Co., serving Malverne and Nassau County since 1984.